Medical appliance with layered base plate and/or sensor assembly part and related methods

ABSTRACT

Embodiments disclosed herein relate to a base plate and/or a sensor assembly part of an ostomy appliance. In embodiments, the base plate and/or the sensor assembly part comprises a first adhesive layer, a masking element, and a plurality of electrodes. The first adhesive layer includes a stomal opening with a center point and a proximal surface configured to be attached to a skin surface of a user. The masking element is arranged on a distal surface of the first adhesive layer, and is more insulative than the first adhesive layer. Further, the plurality of electrodes are arranged on a distal side of the first adhesive layer. Each electrode includes a sensing part and a conductor part and the masking element is arranged between the conductor parts and the first adhesive layer.

The present disclosure relates to an ostomy system, devices thereof and method for manufacturing an ostomy appliance. The ostomy appliance system comprises an ostomy appliance and an ostomy monitor device. In particular, the present disclosure relates to a base plate and/or a sensor assembly part of an ostomy appliance including electrodes for detecting and monitoring the operation of an ostomy appliance.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are included to provide a further understanding of embodiments and are incorporated into and a part of this specification. The drawings illustrate embodiments and together with the description serve to explain principles of embodiments. Other embodiments and many of the intended advantages of embodiments will be readily appreciated as they become better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale relative to each other. Like reference numerals designate corresponding similar parts.

FIG. 1 illustrates an exemplary ostomy system,

FIG. 2 illustrates an exemplary monitor device of the ostomy system,

FIG. 3 is an exploded view of a base plate of an ostomy appliance,

FIG. 4 is an exploded view of an exemplary electrode assembly,

FIG. 5 is a proximal view of parts of a base plate and/or a sensor assembly part,

FIG. 6 is a distal view of an exemplary electrode configuration,

FIG. 7 is a distal view of an exemplary masking element,

FIG. 8 is a distal view of an exemplary first adhesive layer,

FIG. 9 is a proximal view of the first adhesive layer of FIG. 8,

FIG. 10 is a distal view of a part of the base plate and/or sensor assembly part including a monitor interface.

DETAILED DESCRIPTION

Various exemplary embodiments and details are described hereinafter, with reference to the figures when relevant. It should be noted that the figures may or may not be drawn to scale and that elements of similar structures or functions are represented by like reference numerals throughout the figures. It should also be noted that the figures are only intended to facilitate the description of the embodiments. They are not intended as an exhaustive description of the invention or as a limitation on the scope of the invention. In addition, an illustrated embodiment needs not have all the aspects or advantages shown. An aspect or an advantage described in conjunction with a particular embodiment is not necessarily limited to that embodiment and can be practiced in any other embodiments even if not so illustrated, or if not so explicitly described.

Throughout this disclosure, the words “stoma” and “ostomy” are used to denote a surgically created opening bypassing the intestines or urinary tract system of a person. The words are used interchangeably, and no differentiated meaning is intended. The same applies for any words or phrases derived from these, e.g. “stomal”, “ostomies” etc. Also, the solid and liquid wastes emanating from the stoma may be referred to as both stomal “output,” “waste(s),” and “fluids” interchangeably. A subject having undergone ostomy surgery may be referred to as “ostomist” or “ostomate”—moreover, also as “patient” or “user”. However, in some cases “user” may also relate or refer to a health care professional (HCP), such as a surgeon or an ostomy care nurse or others. In those cases, it will either be explicitly stated, or be implicit from the context that the “user” is not the “patient” him- or herself.

In the following, whenever referring to proximal side or surface of a layer, an element, a device or part of a device, the referral is to the skin-facing side or surface, when a user wears the ostomy appliance. Likewise, whenever referring to the distal side or surface of a layer, an element, a device or part of a device, the referral is to the side or surface facing away from the skin, when a user wears the ostomy appliance. In other words, the proximal side or surface is the side or surface closest to the user, when the appliance is fitted on a user and the distal side is the opposite side or surface—the side or surface furthest away from the user in use.

The axial direction is defined as the direction of the stoma, when a user wears the appliance. Thus, the axial direction is generally perpendicular to the skin or abdominal surface of the user.

The radial direction is defined as perpendicular to the axial direction. In some sentences, the words “inner” and “outer” may be used. These qualifiers should generally be perceived with respect to the radial direction, such that a reference to an “outer” element means that the element is farther away from a centre portion of the ostomy appliance than an element referenced as “inner”. In addition, “innermost” should be interpreted as the portion of a component forming a centre of the component and/or being adjacent to the centre of the component. In analogy, “outermost” should be interpreted as a portion of a component forming an outer edge or outer contour of a component and/or being adjacent to that outer edge or outer contour.

The use of the word “substantially” as a qualifier to certain features or effects in this disclosure is intended to simply mean that any deviations are within tolerances that would normally be expected by the skilled person in the relevant field.

The use of the word “generally” as a qualifier to certain features or effects in this disclosure is intended to simply mean—for a structural feature: that a majority or major portion of such feature exhibits the characteristic in question, and—for a functional feature or an effect: that a majority of outcomes involving the characteristic provide the effect, but that exceptionally outcomes do no provide the effect.

The present disclosure relates to an ostomy system and devices thereof, such as an ostomy appliance, a base plate for an ostomy appliance, a monitor device, and optionally one or more accessory devices. Further, methods related to the ostomy system and devices thereof are disclosed. An accessory device (also referred to as an external device) may be a mobile phone or other handheld device. An accessory device may be a personal electronic device, e.g. a wearable, such as a watch or other wrist-worn electronic device. An accessory device may be a docking station. The docking station may be configured to electrically and/or mechanically couple the monitor device to the docking station. The docking station may be configured for charging the monitor device and/or configured for transferring data between the monitor device and the docking station. The ostomy system may comprise a server device. The server device may be operated and/or controlled by the ostomy appliance manufacturer, the accessory device, and/or a service centre.

The present disclosure provides an ostomy system and devices thereof, such as an ostomy appliance, a base plate for an ostomy appliance, a monitor device, and optionally one or more accessory devices which either alone or together facilitate reliable determination of the nature, severity and rapidness of moisture propagation in the adhesive material provided for attaching the base plate to the skin surface of a user. Depending on the nature of the pattern of moisture propagation in the adhesive, the ostomy system and devices thereof enable providing information to the user about the type of failure, and in turn enable providing an indication to the user of the severity and thus the remaining time frame for replacing the ostomy appliance without experiencing severe leakage and/or skin damage.

The ostomy appliance comprises a base plate and an ostomy pouch (also referred to as an ostomy bag). The ostomy appliance may be a colostomy appliance, an ileostomy appliance or a urostomy appliance. The ostomy appliance may be a two-part ostomy appliance, i.e. the base plate and the ostomy pouch may be releasably coupled e.g. with a mechanical and/or an adhesive coupling, e.g. to allow that a plurality of ostomy pouches can be utilized (exchanged) with one base plate. Further, a two-part ostomy appliance may facilitate correct application of the base plate to skin, e.g. to an improved user sight of the stomal region. The ostomy appliance may be a one-part ostomy appliance, i.e. the base plate and the ostomy pouch may be fixedly attached to each other. The base plate is configured for coupling to a user's stoma and/or skin surrounding the stoma, such as a peristomal skin area.

The ostomy appliance includes a base plate, such as a monolithic, one-piece base plate, e.g. integrated with a sensor assembly part, or a base plate and a separate sensor assembly part, such as a sensor assembly part to be subsequently applied to a base plate. For example, to allow an arbitrary base plate, such as a conventional base plate, to achieve the features as described herein. Features as described with respect to the base plate herein may be provided by a sensor assembly part to be applied to a base plate, e.g. by the user. A sensor assembly part may be adapted to adhere to an ostomy plate.

A disclosed method of attaching a base plate to a user's stoma and/or skin surrounding the stoma, such as the peristomal skin area, may comprise attaching a sensor assembly part to a base plate and attaching the base plate, e.g. together with the attached sensor assembly part, to the user's stoma and/or skin surrounding the stoma, such as the peristomal skin area. Alternatively, the method of attaching the base plate to the user's stoma and/or skin surrounding the stoma may comprise attaching the sensor assembly part to the user's stoma and/or skin surrounding the stoma and attaching the base plate to the user's stoma and/or skin surrounding the stoma above the attached sensor assembly part.

The base plate and/or the sensor assembly part may comprise a first adhesive layer, also denoted center adhesive layer. During use, the first adhesive layer adheres to the user's skin (peristomal area) and/or to additional seals, such as sealing paste, sealing tape and/or sealing ring. Thus, the first adhesive layer may be configured for attachment of the base plate and/or the sensor assembly part to the skin surface of a user. The first adhesive layer may have a stomal opening, such as a first adhesive stomal opening, with a center point.

The first adhesive layer may be made of a first composition. The first composition may comprise one or more polyisobutenes and/or styrene-isoprene-styrene. The first composition may comprise one or more hydrocoloids. The first composition may comprise one or more water soluble or water swellable hydrocolloids.

The first composition may be a pressure sensitive adhesive composition suitable for medical purposes comprising a rubbery elastomeric base and one or more water soluble or water swellable hydrocolloids. The first composition may comprise one or more polybutenes, one or more styrene copolymers, one or more hydrocolloids, or any combination thereof. The combination of the adhesive properties of the polybutenes and the absorbing properties of the hydrocolloids renders the first composition suitable for use in ostomy appliances. The styrene copolymer may for example be a styrene-butadiene-styrene block copolymer or a styrene-isoprene-styrene block copolymer. Preferably, one or more styrene-isoprene-styrene (SIS) block type copolymers are employed. The amount of styrene block-copolymer may be from 5% to 20% of the total adhesive composition. The butene component is suitably a conjugated butadiene polymer selected from polybutadiene, polyisoprene. The polybutenes are preferably present in an amount of from 35-50% of the total adhesive composition. Preferably, the polybutene is polyisobutylene (PIB). Suitable hydrocolloids for incorporation in the first composition are selected from naturally occurring hydrocolloids, semisynthetic hydrocolloids and synthetic hydrocolloids. The first composition may comprise 20-60% hydrocolloids. A preferred hydrocolloid is carboxymethylcellulose (CMC). The first composition may optionally contain other components, such as fillers, tackifiers, plasticizers, and other additives.

The first adhesive layer may have a plurality of sensor point openings. A sensor point opening of the first adhesive layer is optionally configured to overlap a part of an electrode, e.g. to form a sensor point.

The sensor point openings of the first adhesive layer may comprise primary sensor point openings. The primary sensor point openings may comprise one or more primary first sensor point openings and one or more primary second sensor point openings, the primary first sensor point openings configured to overlap parts of an electrode and the primary second sensor point openings configured to overlap parts of another electrode different from the electrode at least partly overlapped by the primary first sensor point openings.

The sensor point openings of the first adhesive layer may comprise secondary sensor point openings. The secondary sensor point openings may comprise one or more secondary first sensor point openings and one or more secondary second sensor point openings, the secondary first sensor point openings configured to overlap parts of an electrode and the secondary second sensor point openings configured to overlap parts of another electrode different from the electrode at least partly overlapped by the secondary first sensor point openings.

The sensor point openings of the first adhesive layer may comprise tertiary sensor point openings. The tertiary sensor point openings may comprise one or more tertiary first sensor point openings and one or more tertiary second sensor point openings, the tertiary first sensor point openings configured to overlap parts of an electrode and the tertiary second sensor point openings configured to overlap parts of another electrode different from the electrode at least partly overlapped by the tertiary first sensor point openings.

The first adhesive layer may have a substantially uniform thickness. The first adhesive layer may have a thickness in the range from 0.1 mm to 1.5 mm, e.g. in the range from 0.2 mm to 1.2 mm.

The first adhesive layer may have a primary thickness in a primary part of the first adhesive layer, e.g. in a primary region within a primary radial distance or in a primary radial distance range from the center point of the stomal opening. The primary thickness may be in the range from 0.2 mm to 1.5 mm. such as about 1.0 mm. The primary radial distance may be in the range from 20 mm to 50 mm, such as in the range from 25 mm to 35 mm, e.g. 30 mm.

The first adhesive layer may have a secondary thickness in a secondary part of the first adhesive layer, e.g. in a secondary region outside a secondary radial distance or in a secondary radial distance range from the center point of the stomal opening. The secondary thickness may be in the range from 0.2 mm to 1.0 mm, such as about 0.5 mm. The secondary radial distance may be in the range from 20 mm to 50 mm, such as in the range from 25 mm to 35 mm, e.g. 30 mm.

The base plate and/or the sensor assembly part may comprise a second layer. The second layer may be an adhesive layer, also denoted rim adhesive layer. The second layer may have a second radial extension that is larger than a first radial extension of the first adhesive layer at least in a first angular range of the base plate and/or the sensor assembly part. Accordingly, a part of a proximal surface of the second layer may be configured for attachment to the skin surface of a user. The part of a proximal surface of the second layer configured for attachment to the skin surface of a user is also denoted the skin attachment surface of the second adhesive layer. The second layer may have a stomal opening, such as a second layer stomal opening and/or a second adhesive stomal opening, with a center point.

The second adhesive layer may be made of a second composition. The second composition may comprise one or more polyisobutenes and/or styrene-isoprene-styrene. The second composition may comprise one or more hydrocoloids. The second composition may comprise one or more water soluble or water swellable hydrocolloids.

The second composition may be a pressure sensitive adhesive composition suitable for medical purposes comprising a rubbery elastomeric base and one or more water soluble or water swellable hydrocolloids. The second composition may comprise one or more polybutenes, one or more styrene copolymers, one or more hydrocolloids, or any combination thereof. The combination of the adhesive properties of the polybutenes and the absorbing properties of the hydrocolloids renders the second composition suitable for use in ostomy appliances. The styrene copolymer may for example be a styrene-butadiene-styrene block copolymer or a styrene-isoprene-styrene block copolymer. Preferably, one or more styrene-isoprene-styrene (SIS) block type copolymers are employed. The amount of styrene block-copolymer may be from 5% to 20% of the total adhesive composition. The butene component is suitably a conjugated butadiene polymer selected from polybutadiene, polyisoprene. The polybutenes are preferably present in an amount of from 35-50% of the total adhesive composition. Preferably, the polybutene is polyisobutylene (PIB). Suitable hydrocolloids for incorporation in the second composition are selected from naturally occurring hydrocolloids, semisynthetic hydrocolloids and synthetic hydrocolloids. The second composition may comprise 20-60% hydrocolloids. A preferred hydrocolloid is carboxymethylcellulose (CMC). The second composition may optionally contain other components, such as fillers, tackifiers, plasticizers, and other additives.

Different ratio of contents may change properties of the first and/or second adhesive layers. The second adhesive layer and the first adhesive layer may have different properties. The second adhesive layer (second composition) and the first adhesive layer (first composition) may have different ratios of polyisobutenes, styrene-isoprene-styrene, and/or hydrocoloids. For example, the second adhesive layer may provide a stronger attachment to the skin compared to attachment to the skin provided by the first adhesive layer. Alternatively or additionally, the second adhesive layer may be thinner than the first adhesive layer. Alternatively or additionally, the second adhesive layer may be less water and/or sweat absorbing than the first adhesive layer. Alternatively or additionally, the second adhesive layer may be less mouldable than the first adhesive layer. The second adhesive layer may provide a second barrier against leakage.

The second layer may have a substantially uniform thickness. The second layer may have a thickness in the range from 0.1 mm to 1.5 mm, e.g. in the range from 0.2 mm to 1.0 mm, such as 0.5 mm, 0.6 mm, or 0.7 mm.

The base plate and/or the sensor assembly part may comprise one or more electrodes, such as a plurality of electrodes, such as two, three, four, five, six, seven or more electrodes. The sensor assembly part may be applied to the base plate, such as to provide the base plate with the one or more electrodes.

The electrodes, e.g. some or all the electrodes, may be arranged between the first adhesive layer and the second adhesive layer. The electrodes may be arranged in an electrode assembly, e.g. an electrode layer. In embodiments, the electrode layer may be formed as a water sealing or a water transparent structure to allow water transport from the first adhesive layer to the second adhesive layer. An electrode comprises a connection part for connecting the electrodes to other components and/or interface terminals/terminal elements. An electrode may comprise one or more conductor parts and/or one or more sensing parts. A conductor part may be considered part of an electrode connecting two or more sensing parts, and/or connecting a sensing part with a connection part of the respective electrode. A sensing part may be considered a part of the electrode being suitable for sensing, e.g. liquid, such as liquid content, and/or output, such as output resulting from a leakage, or an imminent leakage. The sensing part may be suitable for sensing e.g. by its shape, said shape potentially being circular, oval, or rectangular. Thus, the conductor part may conduct a signal arising from the sensing part. An electrode may comprise alternating conductor parts and sensing parts. The electrode assembly may be arranged between the first adhesive layer and the second adhesive layer. The base plate and/or the sensor assembly part, e.g. the electrode assembly, may comprise a first electrode, a second electrode and optionally a third electrode. The base plate and/or the sensor assembly part, e.g. the electrode assembly, may comprise a fourth electrode and/or a fifth electrode. The base plate and/or the sensor assembly part, e.g. the electrode assembly, optionally comprises a sixth electrode. The base plate and/or the sensor assembly part, e.g. the electrode assembly, may comprise a ground electrode. The ground electrode may comprise a first electrode part. The first electrode part of the ground electrode may form a ground for the first electrode. The ground electrode may comprise a second electrode part. The second electrode part of the ground electrode may form a ground for the second electrode. The ground electrode may comprise a third electrode part. The third electrode part of the ground electrode may form a ground for the third electrode. The ground electrode may comprise a fourth electrode part. The fourth electrode part of the ground electrode may form a ground for the fourth electrode and/or the fifth electrode.

The ground electrode or electrode parts of the ground electrode may be configured as or form a (common) reference electrode for some or all of the other electrodes of the electrode assembly. The ground electrode may also be denoted reference electrode.

The electrodes are electrically conductive and may comprise one or more of metallic (e.g. silver, copper, gold, titanium, aluminium, stainless steel), ceramic (e.g. ITO), polymeric (e.g. PEDOT, PANI, PPy), and carbonaceous (e.g. carbon black, carbon nanotube, carbon fibre, graphene, graphite) materials.

Two electrodes of the electrode assembly may form a sensor. The first electrode and the ground electrode (e.g. first electrode part of the ground electrode) may form a first sensor or first electrode pair. The second electrode and the ground electrode (e.g. second electrode part of the ground electrode) may form a second sensor or second electrode pair. The third electrode and the ground electrode (e.g. third electrode part of the ground electrode) may form a third sensor or third electrode pair. The fourth electrode and the ground electrode (e.g. fourth electrode part of the ground electrode) may form a fourth sensor or fourth electrode pair. The fifth electrode and the ground electrode (e.g. fifth electrode part of the ground electrode) may form a fifth sensor or fifth electrode pair.

The first electrode may form an open loop. The second electrode may form an open loop and/or the third electrode may form an open loop. The fourth electrode may form an open loop. The fifth electrode may form an open loop. Open loop electrode(s) enables electrode arrangement in few or a single electrode layer.

The electrode assembly may comprise a support layer, also denoted a support film. One or more electrodes may be formed, e.g. printed, on the proximal side of the support layer. One or more electrodes may be formed, e.g. printed, on the distal side of the support layer. The electrode assembly, such as the support layer of the electrode assembly, may have a stomal opening, such as an electrode assembly stomal opening and/or a support layer stomal opening, with a center point.

The support layer may comprise polymeric (e.g. polyurethane, PTFE, PVDF) and/or ceramic (e.g. alumina, silica) materials. In one or more exemplary base plates and/or sensor assembly parts, the support layer is made of thermoplastic polyurethane (TPU). The support layer material may be made of or comprise one or more of polyester, a thermoplastic elastomer (TPE), polyimide, polyimide, Ethylene-vinyl acetate (EVA), polyurea, and silicones.

Exemplary thermoplastic elastomers of the support layer are styrenic block copolymers (TPS, TPE-s), thermoplastic polyolefinelastomers (TPO, TPE-o), thermoplastic Vulcanizates (TPV, TPE-v), thermoplastic polyurethanes (TPU), thermoplastic copolyester (TPC, TPE-E), and thermoplastic polyamides (TPA, TPE-A).

The base plate and/or the sensor assembly part, such as the electrode assembly may comprise a masking element configured to insulate at least parts of the electrodes from the first adhesive layer of the base plate and/or the sensor assembly part. Thus, the masking element may be more insulative, such as less electrically conductive and/or less moisture-permeable than other layers of the base plate and/or sensor assembly part, such as more insulative than the first adhesive layer. The masking element may be arranged between the electrodes and the first adhesive layer. For example, the masking element may be arranged between the conductor parts of the plurality of electrodes and the first adhesive layer. Alternatively or additionally, the masking element optionally is not arranged between the sensing parts of the plurality of electrodes and the first adhesive layer, e.g. the masking element may be arranged such as to not separate the sensing parts of the plurality of electrodes and the first adhesive layer.

The masking element may comprise one or more, such as a plurality of, sensor point openings. The sensor point openings may comprise primary sensor point openings and/or secondary sensor point openings. The sensor point openings may comprise tertiary sensor point opening(s). The sensor point openings may comprise quaternary sensor point opening(s) A sensor point opening of the masking element overlaps at least one electrode of the electrode assembly when seen in the axial direction, e.g. to form a sensor point. For example, a primary sensor point opening may overlap a part of the ground electrode and/or a part of the fourth electrode. A secondary sensor point opening may overlap a part of the fourth electrode and/or a part of the fifth electrode. A tertiary sensor point opening may overlap a part of the fifth electrode and/or a part of the ground electrode.

The masking element may comprise one or more, such as a plurality of, terminal openings. The masking element may comprise polymeric (e.g. polyurethane, PTFE, PVDF) and/or ceramic (e.g. alumina, silica) materials. In one or more exemplary base plates and/or sensor assembly parts, the masking element is made of or comprises thermoplastic polyurethane (TPU). In one or more exemplary base plates and/or sensor assembly parts, the masking element is made of or comprises polyester. The masking element material may be made of or comprise one or more of polyester, a thermoplastic elastomer (TPE), polyimide, polyimide, Ethylene-vinyl acetate (EVA), polyurea, and silicones.

Exemplary thermoplastic elastomers of the masking element are styrenic block copolymers (TPS, TPE-s), thermoplastic polyolefinelastomers (TPO, TPE-o), thermoplastic Vulcanizates (TPV, TPE-v), thermoplastic polyurethanes (TPU), thermoplastic copolyester (TPC, TPE-E), and thermoplastic polyamides (TPA, TPE-A).

The base plate and/or the sensor assembly part may comprise a first intermediate element. The first intermediate element may be arranged between the electrodes/electrode layer and the first adhesive layer and/or between the second layer and the first adhesive layer. The first intermediate layer may be made of an insulating material.

The base plate and/or the sensor assembly part may comprise a release liner. The release liner is a protective layer that protects adhesive layer(s) during transport and storage and is peeled off by the user prior to applying the base plate and/or the sensor assembly part on the skin. The release liner may have a stomal opening, such as a release liner stomal opening, with a center point.

The base plate and/or the sensor assembly part may comprise a top layer. The top layer is a protective layer protecting the adhesive layer(s) from external strains and stress when the user wears the ostomy appliance. The electrodes, e.g. some or all the electrodes, may be arranged between the first adhesive layer and the top layer. The top layer may have a stomal opening, such as a top layer stomal opening, with a center point. The top layer may have a thickness in the range from 0.01 mm to 1.0 mm, e.g. in the range from 0.02 mm to 0.2 mm, such as 0.04 mm.

The base plate and/or the sensor assembly part may comprise a monitor interface. The monitor interface may be configured for electrically and/or mechanically connecting the ostomy appliance (base plate and/or sensor assembly part) to the monitor device. The monitor interface may be configured for wirelessly connecting the ostomy appliance (base plate and/or sensor assembly part) to the monitor device. Thus, the monitor interface of the base plate and/or the sensor assembly part is configured to electrically and/or mechanically couple the ostomy appliance and the monitor device.

The monitor interface of the base plate and/or of the sensor assembly part may comprise, e.g. as part of a first connector of the monitor interface, a coupling part for forming a mechanical connection, such as a releasable coupling between the monitor device and the base plate and/or the sensor assembly part. The coupling part may be configured to engage with a coupling part of the monitor device for releasably coupling the monitor device to the base plate and/or the sensor assembly part.

The monitor interface of the base plate and/or the sensor assembly part may comprise, e.g. as part of a first connector of the monitor interface, a plurality of terminals, such as two, three, four, five, six, seven or more terminals, for forming electrical connections with respective terminals of the monitor device. The monitor interface may comprise a ground terminal element forming a ground terminal. The monitor interface may comprise a first terminal element forming a first terminal, a second terminal element forming a second terminal and optionally a third terminal element forming a third terminal. The monitor interface may comprise a fourth terminal element forming a fourth terminal and/or a fifth terminal element forming a fifth terminal. The monitor interface optionally comprises a sixth terminal element forming a sixth terminal. The terminal elements of the monitor interface may contact respective electrodes of the base plate and/or the sensor assembly part, such as the electrode assembly. The first intermediate element may be arranged between the terminal elements and the first adhesive layer. The first intermediate element may cover or overlap terminal element(s) of the base plate and/or the sensor assembly part when seen in the axial direction. Thus, the first adhesive layer may be protected or experience more evenly distributed mechanical stress from the terminal elements of the base plate and/or the sensor assembly part, in turn reducing the risk of terminal elements penetrating or otherwise damaging the first adhesive layer. The first intermediate element may protect or mechanically and/or electrically shield the first adhesive layer from the terminal elements of the base plate and/or the sensor assembly part.

The base plate may comprise a coupling ring or other coupling member for coupling an ostomy pouch to the base plate (two-part ostomy appliance). The center point may be defined as a center of the coupling ring.

The base plate and/or the sensor assembly part may have a stomal opening with a center point. The stomal opening of the base plate and/or the sensor assembly part may be formed collectively of stomal opening(s) of the layers of the base plate and/or the sensor assembly part, such as of the top layer, the first adhesive layer, the second layer and/or the sensor assembly part. The stomal opening(s) of the layers of the base plate and/or the sensor assembly part, such as of the top layer, the first adhesive layer, the second layer and/or the sensor assembly part may be aligned to form the stomal opening of the base plate and/or the sensor assembly part. The stomal opening may be a through-going passage of the base plate and/or the sensor assembly part. The stomal opening may be arranged substantially in the center of the base plate and/or the sensor assembly part. The stomal opening(s) of the layers of the base plate and/or the sensor assembly part may be arranged substantially in the center of the respective layer. The stomal opening may be configured to receive a stoma of the user and/or the stomal opening may be configured to allow output from the stoma to pass through the stomal opening an into an ostomy pouch attached to the base plate. For example, the stomal opening may be configured to allow passage of output from a proximal side of the base plate and/or sensor assembly part to a distal side of the base plate and/or sensor assembly part. The size and/or shape of the stomal opening may typically be adjusted by the user or nurse before application of the ostomy appliance to accommodate the user's stoma. In one or more exemplary base plates, the user forms the stomal opening during preparation of the base plate for application.

The monitor device comprises a processor and one or more interfaces, such as a first interface and/or a second interface. The monitor device may comprise a memory for storing ostomy data.

In one or more exemplary monitor devices, the processor is configured to apply a processing scheme, the first interface is connected to the processor and the memory, and the first interface is configured for collecting ostomy data from the base plate and/or the sensor assembly part coupled to the first interface. The ostomy data may comprise one or more, such as all, of first ostomy data from a first electrode pair of the base plate and/or the sensor assembly part, second ostomy data from a second electrode pair of the base plate and/or the sensor assembly part, and third ostomy data from a third electrode pair of the base plate and/or the sensor assembly part. A second interface is connected to the processor. To apply a processing scheme may comprise one or more of obtain first parameter data based on the first ostomy data; obtain second parameter data based on the second ostomy data; and obtain third parameter data based on the third ostomy data. To apply a processing scheme may comprise determining an operating state of the base plate and/or the sensor assembly part of the ostomy appliance based on one or more, such as all, of the first parameter data, the second parameter data and the third parameter data. The operating state may be indicative of a degree of radial erosion of the base plate and/or the sensor assembly part, such as of the first adhesive layer, and/or an acute leakage risk for the ostomy appliance. The monitor device is configured to, in accordance with a determination that the operating state is a first operating state, transmit a first monitor signal comprising monitor data indicative of the first operating state of the base plate and/or the sensor assembly part via the second interface; and/or in accordance with a determination that the operating state is a second operating state, transmit a second monitor signal comprising monitor data indicative of the second operating state of the base plate and/or the sensor assembly part via the second interface.

In one or more exemplary monitor devices, the first operating state of the base plate and/or the sensor assembly part corresponds to a situation wherein the first adhesive layer of the base plate and/or the sensor assembly part has experienced a first degree of radial erosion, e.g. the first adhesive layer is eroded to a first radial distance of the first electrode pair but not to a second radial distance of the second electrode pair.

In one or more exemplary monitor devices, the second operating state of the base plate and/or the sensor assembly part corresponds to a situation wherein the first adhesive layer of the base plate and/or the sensor assembly part has experienced a second degree of radial erosion, e.g. the first adhesive layer is eroded to the second radial distance of the second electrode pair but not to a third radial distance of the third electrode pair.

To obtain first parameter data based on the first ostomy data may comprise determining one or more first parameters based on the first ostomy data. To obtain second parameter data based on the second ostomy data may comprise determining one or more second parameters based on the second ostomy data. To obtain third parameter data based on the third ostomy data may comprise determining one or more third parameters based on the third ostomy data. In one or more exemplary monitor devices, determination of an operating state may be based on one or more first parameters, such as first primary parameter and/or first secondary parameter of first parameter data. In one or more exemplary monitor devices, determination of an operating state may be based on one or more second parameters, such as second primary parameter and/or second secondary parameter of the second parameter data. In one or more exemplary monitor devices, determination of an operating state may be based on one or more third parameters, such as third primary parameter and/or third secondary parameter of the third parameter data.

In one or more exemplary monitor devices, determination of an operating state may be based on one or more fourth parameters, such as fourth primary parameter and/or fourth secondary parameter of the fourth parameter data.

The first parameter data, the second parameter data, and the third parameter data may be indicative of resistance between the first electrode pair, the second electrode pair, and the third electrode pair, respectively.

The first parameter data, the second parameter data, and the third parameter data may be indicative of a rate of change in resistance between the first electrode pair, the second electrode pair, and the third electrode pair, respectively.

In one or more exemplary monitor devices, to determine an operating state of the base plate and/or the sensor assembly part is based on a first criteria set based on the first parameter data and/or the second parameter data, wherein the operating state is determined to be the first operating state if the first criteria set is satisfied. The first criteria set may comprise one or more first criteria based on one or more of first parameter data, second parameter data and third parameter data. The first criteria set may comprise a first primary criterion based on the first parameter data. The first criteria set may comprise a first secondary criterion based on the second parameter data. The first criteria set may comprise a first tertiary criterion based on the third parameter data.

In one or more exemplary monitor devices, to determine an operating state of the base plate and/or the sensor assembly part may be based on a first threshold set comprising one or a plurality of first threshold values. The first threshold set may comprise one or a plurality of threshold values, e.g. to be applied in the first criteria set. The first threshold set may comprise a first primary threshold value. The first threshold set may comprise a first secondary threshold value. The first threshold set may comprise a first tertiary threshold value.

The first criteria set may be given by

-   -   (P_1_1<TH_1_1),     -   (P_2_1>TH_1_2), and     -   (P_3_1>TH_1_3),

wherein P_1_1 is a first primary parameter based on the first parameter data, TH_1_1 is a first primary threshold value, P_2_1 is a second primary parameter based on the second parameter data, TH_1_2 is a first secondary threshold value, P_3_1 is a third primary parameter based on the third parameter data, and TH_1_3 is a first tertiary threshold value, and wherein the first operating state is indicative of low degree of radial erosion on the base plate and/or the sensor assembly part. The first threshold values (TH_1_1, TH_1_2 and TH_1_3) may be the same or different, e.g. depending on the electrode configuration of the base plate and/or the sensor assembly part. The first tertiary criterion (P_3_1<TH_1_3) may be omitted in the first criteria set.

The first primary parameter P_1_1 may be indicative of the resistance between the first electrode pair (first electrode and first electrode part of the ground electrode) of the base plate and/or the sensor assembly part.

The second primary parameter may be indicative of the resistance between the second electrode pair (second electrode and second electrode part of the ground electrode) of the base plate and/or the sensor assembly part.

The third primary parameter may be indicative of resistance between the third electrode pair (third electrode and third electrode part of the ground electrode) of the base plate and/or the sensor assembly part.

In one or more exemplary monitor devices, to determine an operating state of the base plate and/or the sensor assembly part is based on a second criteria set based on the second parameter data and/or the third parameter data, wherein the operating state is determined to be the second operating state if the second criteria set is satisfied. The second criteria set may be based on the first parameter data.

The second criteria set may comprise one or more second criteria based on one or more of first parameter data, second parameter data and third parameter data. The second criteria set may comprise a second primary criterion based on the first parameter data. The second criteria set may comprise a second secondary criterion based on the second parameter data. The second criteria set may comprise a second tertiary criterion based on the third parameter data.

In one or more exemplary monitor devices, to determine an operating state of the base plate and/or the sensor assembly part is based on a second threshold set comprising one or a plurality of second threshold values. The second threshold set may comprise one or a plurality of threshold values, e.g. to be applied in the second criteria set. The second threshold set may comprise a second primary threshold value. The second threshold set may comprise a second secondary threshold value. The second threshold set may comprise a second tertiary threshold value.

The second criteria set may be given by

-   -   (P_1_1<TH_2_1),     -   (P_2_1<TH_2_2), and     -   (P_3_1>TH_2_3)

wherein P_1_1 is a first primary parameter based on the first parameter data and indicative of the resistance between the first electrode pair, TH_2_1 is a second primary threshold value, P_2_1 is a second primary parameter based on the second parameter data and indicative of the resistance between the second electrode pair, TH_2_2 is a second secondary threshold value, P_3_1 is a third primary parameter based on the third parameter data and indicative of the resistance between the third electrode pair, TH_2_3 is a second tertiary threshold value, and wherein the second operating state is indicative of medium degree of radial erosion on the base plate and/or the sensor assembly part. The second threshold values (TH_2_1, TH_2_2 and TH_2_3) may be the same or different, e.g. depending on the electrode configuration of the base plate and/or the sensor assembly part. The second primary criterion (P_1_1<TH_2_1) and/or the second tertiary criterion (P_3_1>TH_2_3) may be omitted in the second criteria set.

In one or more exemplary monitor devices, to determine an operating state of the base plate and/or the sensor assembly part is based on a default criteria set based on the first parameter data, wherein the operating state is determined to be the default operating state if the default criteria set is satisfied, and in accordance with a determination that the operating state is the default operating state, transmit a default monitor signal comprising monitor data indicative of the default operating state of the ostomy appliance.

The default criteria set may be given by

-   -   (P_1_1>TH_D_1),     -   (P_2_1>TH_D_2), and     -   (P_3_1>TH_D_3)

wherein P_1_1 is a first primary parameter based on the first parameter data and indicative of the resistance between the first electrode pair, TH_D_1 is a default primary threshold value, P_2_1 is a second primary parameter based on the second parameter data and indicative of the resistance between the second electrode pair, TH_D_2 is a default secondary threshold value, P_3_1 is a third primary parameter based on the third parameter data and indicative of the resistance between the third electrode pair, TH_D_3 is a default tertiary threshold value, and wherein the default operating state is indicative of very low or no degree of radial erosion on the base plate and/or the sensor assembly part. The default threshold values (TH_D_1, TH_D_2 and TH_D_3) may be the same or different, e.g. depending on the electrode configuration of the base plate and/or the sensor assembly part.

In one or more exemplary monitor devices, to determine an operating state of the base plate and/or the sensor assembly part is based on a third criteria set based on the third parameter data, wherein the operating state is determined to be the third operating state if the third criteria set is satisfied, and in accordance with a determination that the operating state is the third operating state, transmit a third monitor signal comprising monitor data indicative of the third operating state of the ostomy appliance.

In one or more exemplary monitor devices, the third operating state of the base plate and/or the sensor assembly part corresponds to a situation wherein the first adhesive layer of the base plate and/or the sensor assembly part has experienced a third degree of radial erosion, e.g. the first adhesive layer is eroded to the third radial distance of the third electrode pair. The third criteria set may be given by

-   -   (P_1_1<TH_3_1),     -   (P_2_1<TH_3_2), and     -   (P_3_1<TH_3_3)

wherein P_1_1 is a first primary parameter based on the first parameter data and indicative of the resistance between the first electrode pair, TH_3_1 is a third primary threshold value, P_2_1 is a second primary parameter based on the second parameter data and indicative of the resistance between the second electrode pair, TH_3_2 is a third secondary threshold value, P_3_1 is a third primary parameter based on the third parameter data and indicative of the resistance between the third electrode pair, TH_3_3 is a third tertiary threshold value, and wherein the third operating state is indicative of high degree of radial erosion on the base plate and/or the sensor assembly part. The third threshold values (TH_3_1, TH_3_2 and TH_3_3) may be the same or different, e.g. depending on the electrode configuration of the base plate and/or the sensor assembly part. The third primary criterion (P_1_1<TH_3_1) and/or the third secondary criterion (P_2_1<TH_3_2) may be omitted in the third criteria set.

In one or more exemplary monitor devices, the ostomy data comprises fourth ostomy data from a fourth electrode pair of the base plate and/or the sensor assembly part. To apply a processing scheme may comprise to obtain fourth parameter data based on the fourth ostomy data, and determine an operating state of the base plate and/or the sensor assembly part of the ostomy appliance based on the fourth parameter data. The monitor device may be configured to, in accordance with a determination that the operating state is a fourth operating state, transmit a fourth monitor signal comprising monitor data indicative of the fourth operating state of the ostomy appliance.

In one or more exemplary monitor devices, the fourth operating state of the base plate and/or the sensor assembly part corresponds to a situation, wherein the fourth electrode pair detects fluid, such as output, between the distal surface of first adhesive layer and the skin of the user at a fourth radial distance, and thus there is a high risk of leakage from the ostomy appliance in the fourth operating state.

The fourth criteria set may be given by

-   -   (P_4_1<TH_4_4)

wherein P_4_1 is a fourth primary parameter based on the fourth parameter data and indicative of the resistance between the fourth electrode pair and TH_4_4 is a fourth quaternary threshold value, and wherein the fourth operating state is indicative of high risk of leakage from the ostomy appliance.

The monitor device comprises a monitor device housing optionally made of a plastic material. The monitor device housing may be an elongate housing having a first end and a second end. The monitor device housing may have a length or maximum extension along a longitudinal axis in the range from 1 cm to 15 cm. The monitor device housing may have a width or maximum extension perpendicular to the longitudinal axis in the range from 0.5 cm to 3 cm. The monitor device housing may be curve-shaped. Additionally or alternatively, the monitor device housing may be rigid or flexible.

The monitor device comprises a first interface. The first interface may be configured as an appliance interface for electrically and/or mechanically connecting the monitor device to the ostomy appliance. Thus, the appliance interface is configured to electrically and/or mechanically couple the monitor device and the ostomy appliance. The first interface may be configured as an accessory device interface for electrically and//or mechanically connecting the monitor device to an accessory device, such as a docking station. The first interface may be configured for coupling to a docking station of the ostomy system, e.g. for charging the monitor device and/or for data transfer between the monitor device and the docking station.

The first interface of the monitor device may comprise a plurality of terminals, such as two, three, four, five, six, seven or more terminals, for forming electrical connections with respective terminals and/or electrodes of the ostomy appliance. One or more terminals of the first interface may be configured for forming electrical connections with an accessory device, e.g. with respective terminals of a docking station. The first interface may comprise a ground terminal. The first interface may comprise a first terminal, a second terminal and optionally a third terminal. The first interface may comprise a fourth terminal and/or a fifth terminal. The first interface optionally comprises a sixth terminal. In one or more exemplary monitor devices, the first interface has M terminals, wherein M is an integer in the range from 4 to 8.

The first interface of the monitor device may comprise a coupling part for forming a mechanical connection, such as a releasable coupling between the monitor device and the base plate and/or the sensor assembly part. The coupling part and the terminals of the first interface form (at least part of) a first connector of the monitor device.

The monitor device comprises a power unit for powering the monitor device. The power unit may comprise a battery. The power unit may comprise charging circuitry connected to the battery and terminals of the first interface for charging the battery via the first interface, e.g. the first connector. The first interface may comprise separate charging terminal(s) for charging the battery. Additionally or alternatively, the sensor terminal may change its function if the charging voltage is sensed at relevant terminals.

The monitor device may comprise a sensor unit with one or more sensor. The sensor unit is connected to the processor for feeding sensor data to the processor. The sensor unit may comprise an accelerometer for sensing acceleration and provision of acceleration data to the processor. The sensor unit may comprise a temperature sensor for provision of temperature data to the processor.

The monitor device comprises a second interface connected to the processor. The second interface may be configured as an accessory interface for connecting, e.g. wirelessly connecting, the monitor device to one or more accessory devices. The second interface may comprise an antenna and a wireless transceiver, e.g. configured for wireless communication at frequencies in the range from 2.4 to 2.5 GHz. The wireless transceiver may be a Bluetooth transceiver, i.e. the wireless transceiver may be configured for wireless communication according to Bluetooth protocol, e.g. Bluetooth Low Energy, Bluetooth 4.0, Bluetooth 5. The second interface optionally comprises a loudspeaker and/or a haptic feedback element for provision of an audio signal and/or haptic feedback to the user, respectively.

The monitor device may be electrically coupled to the plurality of electrodes of the base plate and/or the sensor assembly part. For example, the monitor device may be couplable, such as releasably couplable, to the plurality of electrodes of the base plate and/or the sensor assembly part. The monitor device may be configured to measure one or more resistances between the plurality of electrodes, and detect the leakage of output based on the measured one or more resistances.

In one or more exemplary ostomy systems, the monitor device forms an integrated part of the ostomy appliance, e.g. the monitor device may form an integrated part of a base plate and/or the sensor assembly part of the ostomy appliance.

The ostomy system may comprise a docking station forming an accessory device of the ostomy system. The docking station may be configured to electrically and/or mechanically couple the monitor device to the docking station.

The docking station may comprise a docking monitor interface. The docking monitor interface may be configured for electrically and/or mechanically connecting the monitor device to the docking station. The docking monitor interface may be configured for wirelessly connecting the monitor device to the docking station. The docking monitor interface of the docking station may be configured to electrically and/or mechanically couple the docking station and the monitor device.

The docking monitor interface of the docking station may comprise, e.g. as part of a first connector of the docking monitor interface, a coupling part for forming a mechanical connection, such as a releasable coupling between the monitor device and the docking station. The coupling part may be configured to engage with a coupling part of the monitor device for releasably coupling the monitor device to the docking station.

The docking monitor interface of the docking station may comprise, e.g. as part of a first connector of the docking monitor interface, a plurality of terminals, such as two, three, four, five, six, seven or more terminals, for forming electrical connections with respective terminals of the monitor device. The docking monitor interface may comprise a ground terminal. The docking monitor interface may comprise a first terminal and/or a second terminal. The docking station may comprise a third terminal. The docking monitor interface may comprise a fourth terminal and/or a fifth terminal. The docking monitor interface optionally comprises a sixth terminal.

Disclosed is a base plate and/or a sensor assembly part of an ostomy appliance. The base plate and/or the sensor assembly part comprises a first adhesive layer including: a stomal opening with a center point and a proximal surface configured to be attached to a skin surface of a user. In embodiments, the base plate and/or the sensor assembly part may comprise a masking element arranged on a distal surface of the first adhesive layer, wherein the masking element may be more insulative, such as less electrically conductive and/or less moisture-permeable, than the first adhesive layer. Additionally or alternatively, the base plate and/or the sensor assembly part may comprise a plurality of electrodes arranged on a distal side of the first adhesive layer, wherein each electrode includes a sensing part and a conductor part, wherein the masking element may be arranged between the conductor parts and the first adhesive layer.

In embodiments, the sensing parts of each electrode may facilitate determining a leak between a skin surface of the user and the base plate and/or the sensor assembly part, and/or the state of the adhesive device. Additionally or alternatively, by including a masking element arranged between the conductor parts and the first adhesive layer, the conductor parts of the electrodes may be insulated from the first adhesive layer, which may prevent more than one of the conductor parts of the electrodes from shorting together due to moisture absorption of the first adhesive layer.

The plurality of electrodes may be formed on a proximal surface of a support layer. The support layer may increase the structural integrity of the electrodes to, perhaps, reduce the likelihood the electrodes are damaged and/or broken.

The plurality of electrodes may be printed on the support layer.

The plurality of electrodes may form a first resistive pair of electrodes and a second resistive pair of electrodes, wherein each resistive pair of electrodes may include an electrode part of a ground electrode. The first and second resistive pairs of the electrodes may facilitate determining the adhesion between the base plate and/or the sensor assembly part and the skin surface of a user. By determining the adhesion between the base plate and/or the sensor assembly part and the skin surface of a user, the user may be alerted if the adhesion is deteriorating.

The moisture content of a respective sensing zone may be indicative of how well the first adhesive layer is adhering to the skin surface of a user. To determine the moisture content of a respective sensing zone, a resistance between the electrodes included in the first, second, and/or third resistive pairs may be sensed by, for example, the monitor device. And, when the resistance between the electrodes included in the first, second, and/or third resistive pairs decreases below a threshold level, the monitor device may send an indication to the user that the adhesion between the first adhesive layer and the skin surface of a user may be deteriorating. In embodiments, when the adhesion between the first adhesive layer and the skin surface of a user proximal to the third resistive pair deteriorates, the monitor device may send a signal to the user suggesting the user change his/her ostomy appliance and/or base plate. Additionally or alternatively, when the adhesion between the first adhesive layer and the skin surface of a user proximal to the first resistive pair and/or second resistive pair deteriorates, the monitor device may send a signal to the user suggesting the user change his/her ostomy appliance and/or base plate.

In embodiments, the second resistive pair of electrodes may at least partially surround the first resistive pair of electrodes. By including a second resistive pair that at least partially surrounds a first resistive pair, a velocity of the deterioration of adhesion between the base plate and/or the sensor assembly part and the skin surface of a user may be determined.

The plurality of electrodes may form a third resistive pair of electrodes, wherein the third resistive pair of electrodes includes an electrode part of a ground electrode.

The third resistive pair of electrodes may at least partially surround the second resistive pair of electrodes. By including a third resistive pair that at least partially surrounds the second resistive pair of electrodes, and determining a velocity of adhesion deterioration based on the first and second resistive pairs, a prediction may be made as to when the adhesion between the skin surface of a user and the base plate and/or the sensor assembly part proximal to the third resistive pair may deteriorate.

By including different resistive pairs which at least partially surround one another, a monitor device may determine how quickly the adhesion between the first adhesive layer and the skin surface of a user may be deteriorating. For example, a monitor device may determine that at time t₁ the adhesion between the first adhesive layer and the skin surface of a user proximal to the first resistive pair is deteriorating by sensing a reduced resistance between the electrodes included in the first resistive pair. Then, at time t₂ the monitor device may determine the adhesion between the first adhesive layer and the skin surface of a user proximal to the second resistive pair is deteriorating by sensing a reduced resistance between the electrodes included in the second resistive pair. By knowing the distance between the first and second resistive pairs, the monitor device may calculate a velocity by dividing the distance between the first and second resistive pairs by the difference between t₁ and t₂. The computed velocity may then determine how much time a user has before the adhesion between the first adhesive layer and the skin surface of a user proximal to the third resistive pair deteriorates, which may be when the user would like to change his/her ostomy appliance and/or base plate.

In embodiments, at least one of the first resistive pair, the second resistive pair, and the third resistive pair may be arranged circumferentially around the center point the stomal opening of the base plate and/or the sensor assembly part.

The base plate and/or the sensor assembly part may comprise a first intermediate element. The first intermediate element may be less compliant than the first adhesive layer, e.g. the first intermediate element may be more rigid than the first adhesive layer. Each electrode may include a connection part, and the first intermediate element may be arranged between the connection parts and the first adhesive layer. By including the first intermediate element, the connection parts of the electrodes may be less likely to be damaged and/or broken.

In embodiments, the first intermediate element may facilitate protecting the terminal elements and/or the connection parts. For example, the first intermediate element may be less compliant than the first adhesive layer, the second adhesive layer, and/or the masking element. By being less compliant, the first intermediate element may reduce the ability of the terminal elements and/or the connection parts to flex. As such, the terminal elements and/or the connection parts may be less likely to break due to flexure. In embodiments, the first intermediate element may comprise at least one of polymeric (e.g. polyurethane, PTFE, PVDF) and ceramic (e.g. alumina, silica) materials.

Additionally or alternatively, the first intermediate element may reduce the likelihood that more than one of the terminal elements are shorted together and/or more than one of the connection parts are shorted together. For example, the first intermediate element may be less moisture absorbent than the first adhesive layer and/or the masking element. By being less moisture absorbent, the first intermediate element may prevent moisture (e.g., sweat, output, etc.) from coming into contact with one or more of the terminal elements and/or the connection parts via the first adhesive layer and/or the masking element and, potentially, shorting a combination of the terminal elements together and/or a combination of the connection parts together.

In embodiments, each electrode may include a connection part, wherein the masking element may comprise a plurality of terminal openings, and wherein each terminal opening may overlap a connection part.

In embodiments, wherein the first adhesive layer comprises a plurality of openings, wherein the masking element comprises a plurality of openings, and wherein each opening of the plurality of openings of the first adhesive layer overlaps an opening of the plurality of openings of the masking element, a sensor point is defined. In embodiments, the sensor points may be used to detect a leakage between a skin surface of a user and the base plate and/or the sensor assembly part.

In embodiments, the sensor points may be arranged at generally equal distances from the center point.

The base plate and/or the sensor assembly part may further comprise a second adhesive layer arranged distally of the plurality of electrodes. The second adhesive layer may protect the electrodes and/or add structural integrity to the base plate and/or the sensor assembly part.

In embodiments, the first adhesive layer and the second adhesive layer may be comprised of different ratios of one or more of: polyisobutenes, styrene-isoprene-styrene, and/or hydrocoloids. By being comprised of different ratios of materials, the second adhesive layer may provide a stronger attachment to the skin compared to attachment to the skin provided by the first adhesive layer and/or the first adhesive layer may provide less irritation to the skin surface of a user.

FIG. 1 illustrates an exemplary ostomy system. The ostomy system 1 comprises an ostomy appliance 2 including a base plate 4. The base plate 4 is adapted to support an ostomy pouch (not shown). Further, the ostomy system 1 comprises a monitor device 6 and an accessory device 8 (mobile telephone). The monitor device 6 is connectable to the base plate 4 via respective first connectors of the monitor device 6 and base plate 4. The monitor device 6 is configured for wireless communication with the accessory device 8. Optionally, the accessory device 8 is configured to communicate with a server device 10 of the ostomy system 1, e.g. via network 12. The server device 10 may be operated and/or controlled by the ostomy appliance manufacturer, the accessory device 8, and/or a service centre. Ostomy data or parameter data based on the ostomy data are obtained from electrodes/sensors of the ostomy appliance 2 with the monitor device 6. The monitor device 6 processes the ostomy data and/or parameter data based on the ostomy data. Based on the processed ostomy data, the monitor device 6 may determine what monitor data that are transmitted to the accessory device 8. In the illustrated ostomy system, the accessory device 8 is a mobile phone, however the accessory device 8 may be embodied as another handheld device, such as a tablet device, or a wearable, such as a watch or other wrist-worn electronic device. Accordingly, the monitor device 6 is configured to determine and transmit monitor data to the accessory device 8. The base plate 4 comprises a coupling member 14 in the form of a coupling ring 16 for coupling an ostomy pouch (not shown) to the base plate (two-part ostomy appliance). In alternative embodiments, the ostomy pouch may be formed together with the base plate (one-part ostomy appliance).The base plate has a stomal opening 18 with a center point. The size and/or shape of the stomal opening 18 is typically adjusted by the user or nurse before application of the ostomy appliance to accommodate the user's stoma.

The ostomy system 1 optionally comprises a docking station 20 forming an alternative/additional accessory device of the ostomy system 1. The docking station 20 comprises a docking monitor interface including a first connector 22 configured for electrically and/or mechanically connecting the monitor device 6 to the docking station 20. The docking monitor interface may be configured for wirelessly connecting the monitor device to the docking station. The docking station 20 comprises a user interface 24 for receiving user input and/or providing feedback to the user on the operational state of the docking station 20. The user interface 24 may comprise a touch-screen. The user interface 24 may comprise one or more physical buttons and/or one or more visual indicators, such as light emitting diodes,

FIG. 2 is a schematic block diagram of an exemplary monitor device. The monitor device 6 comprises a monitor device housing 100, a processor 101 and one or more interfaces, the one or more interfaces including a first interface 102 (appliance interface) and a second interface 104 (accessory interface). The monitor device 6 comprises a memory 106 for storing ostomy data and/or parameter data based on the ostomy data. The memory 106 is connected to the processor 101 and/or the first interface 102.

The first interface 102 is configured as an appliance interface for electrically and/or mechanically connecting the monitor device 6 to the ostomy appliance, e.g. ostomy appliance 2. The first interface 102 comprises a plurality of terminals for forming electrical connections with respective terminals of the ostomy appliance 2 (base plate 4). In embodiments, the first interface 102 comprises a ground terminal 108, a first terminal 110, a second terminal 112 and a third terminal 114. The first interface 102 may also comprise a fourth terminal 116 and a fifth terminal 118. The first interface 102 of the monitor device 6 comprises a coupling part 120 for forming a mechanical connection, such as a releasable coupling between the monitor device and the base plate. The coupling part 120 and the terminals 108, 110, 112, 114, 116, and 118 of the first interface 102 form (at least part of) a first connector of the monitor device 6.

The monitor device 6 comprises a power unit 121 for powering the monitor device and active components thereof, i.e. the power unit 121 is connected to the processor 101, the first interface 102, the second interface 104, and memory 106. The power unit comprises a battery and charging circuitry. The charging circuitry is connected to the battery and terminals of the first interface 102 for charging the battery via terminals of the first interface, e.g. terminals of the first connector.

The second interface 104 of monitor device is configured as an accessory interface for connecting the monitor device 6 to one or more accessory devices such as accessory device 8. The second interface 104 comprises an antenna 122 and a wireless transceiver 124 configured for wireless communication with accessory device(s). Optionally, the second interface 104 comprises a loudspeaker 126 and/or a haptic feedback element 128 for provision of respective audio signal and/or haptic feedback to the user.

The monitor device 6 optionally comprises a sensor unit 140 connected to the processor 101. For example, the sensor unit 140 may comprise a temperature sensor for feeding temperature data to the processor and/or a G-sensor or accelerometer for feeding acceleration data to the processor 101. Additionally or alternatively, the sensor unit 140 comprises a humidity sensor and/or an acoustic sensor. The sensor unit 140 may comprise alternative and/or additional sensors suitable and/or relevant to an ostomy system as described.

The processor 101 is configured to apply a processing scheme, and the first interface 102 is configured for collecting ostomy data from the base plate and/or the sensor assembly part coupled to the first interface, the ostomy data comprising first ostomy data from a first electrode pair of the base plate and/or the sensor assembly part, second ostomy data from a second electrode pair of the base plate and/or the sensor assembly part, and third ostomy data from a third electrode pair of the base plate and/or the sensor assembly part. The ostomy data may be stored in the memory 106 and/or processed in the processor 101 in order to obtain parameter data. The parameter data may be stored in the memory 106. The processor 101 is configured to apply a processing scheme, wherein to apply a processing scheme comprises obtain first parameter data based on the first ostomy data; obtain second parameter data based on the second ostomy data; obtain third parameter data based on the third ostomy data. In other words, the processor 101 is configured to obtain first, second and third parameter data based on respective first, second and third ostomy data. To apply a processing scheme comprises to determine an operating state of the base plate and/or the sensor assembly part of the ostomy appliance based on one or more, e.g. all, of the first parameter data, the second parameter data and the third parameter data, wherein the operating state is indicative of a degree of radial erosion of the base plate and/or the sensor assembly part and/or acute leakage risk for the ostomy appliance. The monitor device 6 is configured to, in accordance with a determination that the operating state is a first operating state, transmit a first monitor signal comprising monitor data indicative of the first operating state of the base plate and/or the sensor assembly part via the second interface; and in accordance with a determination that the operating state is a second operating state, transmit a second monitor signal comprising monitor data indicative of the second operating state of the base plate and/or the sensor assembly part via the second interface.

FIG. 3 illustrates an exploded view of an exemplary base plate of an ostomy appliance. The base plate 4 comprises a first adhesive layer 200. In embodiments, the first adhesive layer 200 comprises a stomal opening 18A, which may form part of the stomal opening 18. As stated above, the stomal opening 18 (see FIG. 1) may be adjusted before application to accommodate the user's stoma, which includes adjusting the stomal opening 18A. During use, the stoma-receiving opening 18, including the stomal opening18A, is arranged around a user's stoma and a proximal surface 200B of the first adhesive layer 200 adheres to the skin surface of the user in the peristomal area and/or to additional seals, such as sealing paste, sealing tape and/or sealing ring.

In embodiments, the base plate 4 comprises a second adhesive layer 202, also denoted rim adhesive layer. As illustrated, the second adhesive layer 202 may be arranged distally of the first adhesive layer 200. Additionally or alternatively, a portion of the distal surface 200A of the first adhesive layer 200, which is not covered by the electrode assembly 204, may adhere to a portion of the proximal surface 202B of the second adhesive layer 202. In embodiments, the second adhesive layer 202 may have a second radial extension that is larger than a first radial extension of the first adhesive layer 200 at least in a first angular range of the base plate 4.

The first adhesive layer 200 and/or second adhesive layer 202 may comprise one or more of polyisobutenes, styrene-isoprene-styrene, and/or hydrocoloids. Different ratio of contents may change properties of the first and/or second adhesive layers 200, 202. As such, the second adhesive layer 202 and the first adhesive layer 200 may have different properties due to different ratios of polyisobutenes, styrene-isoprene-styrene, and/or hydrocoloids. For example, the second adhesive layer 202 may provide a stronger attachment to the skin compared to attachment to the skin provided by the first adhesive layer 200. Additionally or alternatively, the first adhesive layer may provide less irritation to the skin surface of a user. In embodiments, the second adhesive layer 202 may be thinner than the first adhesive layer 200. Additionally or alternatively, the second adhesive layer 202 may be less water and/or sweat absorbing than the first adhesive layer 200.

Additionally or alternatively, the second adhesive layer 202 may be less mouldable than the first adhesive layer 200. The second adhesive layer 202 may provide a second barrier against leakage.

The base plate 4 comprises a plurality of electrodes arranged in an electrode assembly 204. The electrode assembly 204 is arranged between the first adhesive layer 200 and the second adhesive layer 202. For example, the electrode assembly 204 may be arranged on a distal side (e.g., the distal surface 200A) of the first adhesive layer 200 and a proximal side (e.g., the proximal surface 202B) of the second adhesive layer 202.

The base plate 4 comprises a release liner 206 that is peeled off by the user prior to applying the base plate 4 on the skin. The base plate 4 comprises a top layer 208 and a coupling ring 209 for coupling an ostomy pouch to the base plate 4. The top layer 208 is a protective layer protecting the second adhesive layer 202 from external strains and stress during use.

The base plate 4 comprises a monitor interface. The monitor interface is configured for electrically and/or mechanically connecting the ostomy appliance (base plate 4) to the monitor device. The monitor interface of the base plate comprises a coupling part 210 for forming a mechanical connection, such as a releasable coupling between the monitor device and the base plate. The coupling part 210 is configured to engage with a coupling part of the monitor device for releasably coupling the monitor device to the base plate 4. Further, the monitor interface of the base plate 4 comprises a plurality of terminal elements respectively forming a plurality of terminals 212 for forming electrical connections with respective terminals of the monitor device. The coupling part 210 and the terminals 212 form a first connector 211 of the base plate 4. The base plate 4 comprises a first intermediate element 213 on the proximal side of the electrode assembly. The first intermediate element 213 is arranged between the terminal elements forming terminals 212 and the first adhesive layer (not shown). The first intermediate element 213 covers the terminal elements forming terminals 212 of the base plate 4 when seen in the axial direction and protects the first adhesive layer from mechanical stress from the terminal elements of the base plate.

As previously described, some parts of the illustrated base plate 4, may be provided as a separate assembly to be applied to an existing base plate, e.g. comprising one or more of the components as described, such as to provide a base plate like the base plate 4 as described. For example, a sensor assembly part 700 may be provided, e.g. comprising the electrode assembly 204, the first connector 211, the first intermediate element 213, the first adhesive layer 200 and the release liner 206. Additionally, the sensor assembly part 700 may also comprise the second adhesive layer 202 and/or the top layer 208. It may be envisioned that the user may provide a hole in layers of the base plate whereto the sensor assembly part 700 is to be applied, to allow for the first connector 211 of the sensor assembly part 700 to protrude through layers of the base plate whereto the sensor assembly part 700 is applied. Alternatively, the sensor assembly part 700 may be applied to the base plate such that the first connector 211 is positioned outside the periphery of the base plate.

FIG. 4 illustrates an exploded view of an exemplary electrode assembly 204 of a base plate and/or a sensor assembly part. The electrode assembly 204 comprises a support layer 214 with proximal surface 214B and electrodes 216 arranged on the proximal side of the support layer 214. The electrode assembly 204 includes a ground electrode, a first electrode, a second electrode, a third electrode, a fourth electrode, and a fifth electrode, wherein each electrode has a respective connection part for connecting the electrodes to respective terminal elements of the monitor interface.

In embodiments, the electrodes 216 are electrically conductive and comprise at least one of metallic (e.g. silver, copper, gold, titanium, aluminium, stainless steel), ceramic (e.g. ITO), polymeric (e.g. PEDOT, PANI, PPy), and carbonaceous (e.g. carbon black, carbon nanotube, carbon fibre, graphene, graphite) materials. Additionally or alternatively, the electrodes 216 may be formed using screen-printing, inkjet-printing, direct-ink-writing, pen-plotting, 3D-printing, fused-deposition-modelling, contact-transfer printing, spray painting, chemical vapour depositing, physical vapour depositing, atomic-layer-depositing, wire-bending, and or any other methods known to a person skilled in the art. In embodiments, the electrodes 216 can require one of heat-curing, UV-curing, and oxygen-activation.

In embodiments, the support layer 214 may increase the structural integrity of the electrodes 216. Additionally or alternatively, the support layer 214 may be moisture resistant or moisture transmissive. In embodiments, the support layer 214 may comprise at least one of polymeric (e.g. polyurethane, PTFE, PVDF) and ceramic (e.g. alumina, silica) materials.

Further, electrode assembly 204 comprises a masking element 218 with proximal surface 218B. In embodiments, the masking element 218 may be arranged on the distal surface 200A of the first adhesive layer 200 (see FIG. 3). Additionally or alternatively, the masking element 218 may be comprised of a material that is more insulative (e.g., less electrically conductive and/or less moisture-permeable) than the first adhesive layer 200. In embodiments, the masking element 218 may comprise at least one of polymeric (e.g. polyurethane, PTFE, PVDF) and ceramic (e.g. alumina, silica) materials. In embodiments, the masking element 218 may cover or overlap with parts of the electrodes 216 when seen in the axial direction. As such, the masking layer 218 may at least partially insulate electrode parts of the electrodes 216 from the first adhesive layer of the base plate 200 and/or the sensor assembly part.

FIG. 5 is a proximal view of proximal surfaces of base plate and/or the sensor assembly part parts of the base plate 4 and/or the sensor assembly part 700 without the first adhesive layer 200 (illustrated in FIG. 3) and the release liner 206 (illustrated in FIG. 3). The base plate 4 comprises a first intermediate element 213 on the proximal side of the electrode assembly, i.e. between the electrode assembly 204 and the first adhesive layer. The first intermediate element 213 covers the terminal elements of the base plate 4 when seen in the axial direction and protects the first adhesive layer 200 from mechanical stress from the terminal elements of the base plate 4 and/or the sensor assembly part 700.

In embodiments, the first intermediate element 213 may facilitate protecting the terminal elements 212 and/or the connection parts 222A, 224A, 226A, 228A, 230A, 232A (see FIG. 6). For example, the first intermediate element 213 may be less compliant than the first adhesive layer 200 (depicted in FIG. 3), the second adhesive layer 202, and/or the masking element 218. By being less compliant, the first intermediate element 213 may reduce the ability of the terminal elements 212 and/or the connection parts 222A, 224A, 226A, 228A, 230A, 232A to flex. As such, the terminal elements 212 and/or the connection parts 222A, 224A, 226A, 228A, 230A, 232A may be less likely to break due to flexure. In embodiments, the first intermediate element 213 may comprise at least one of polymeric (e.g. polyurethane, PTFE, PVDF) and ceramic (e.g. alumina, silica) materials.

Additionally or alternatively, the first intermediate element 213 may reduce the likelihood that more than one of the terminal elements 212 are shorted together and/or more than one of the connection parts 222A, 224A, 226A, 228A, 230A, 232A are shorted together. For example, the first intermediate element 213 may be less moisture absorbent than the first adhesive layer 200 (depicted in FIG. 3) and/or the masking element 218. By being less moisture absorbent, the first intermediate element 213 may prevent moisture (e.g., sweat, output, etc.) from coming into contact with one or more of the terminal elements 212 and/or the connection parts 222A, 224A, 226A, 228A, 230A, 232A via the first adhesive layer 200 and/or the masking element 218 and, potentially, shorting a combination of the terminal elements 212 together and/or a combination of the connection parts 222A, 224A, 226A, 228A, 230A, 232A together.

FIG. 6 is a distal view of an exemplary electrode configuration 220 of electrodes 216 of the electrode assembly 204. The electrode assembly 204, such as the electrode configuration 220, of the electrode assembly 204 comprises a ground electrode 222, a first electrode 224, a second electrode 226, a third electrode 228, a fourth electrode 230, and a fifth electrode 232. The ground electrode 222 comprises a ground connection part 222A, and a ground sensing part 222B. The first electrode 224 comprises a first connection part 224A. The second electrode 226 comprises a second connection part 226A and the third electrode 228 comprises a third connection part 228A. The fourth electrode 230 comprises a fourth connection part 230A and the fifth electrode 232 comprises a fifth connection part 232A. In embodiments, the plurality of electrodes 216 may be coupled to the monitor device 6 via the connection parts 222A, 224A, 226A, 228A, 230A, 232A. In particular, the ground connection part 222A may be connected to the ground terminal 108 via the ground terminal 282 (illustrated in FIG. 10), the first connection part 224A may be connected to the first terminal 110 via the first terminal 284 (illustrated in FIG. 10), the second connection part 226A may be connected to the second terminal 112 via the second terminal 286 (illustrated in FIG. 10), the third connection part 228A may be connected to the third terminal 114 via the third terminal 288 (illustrated in FIG. 10), the fourth connection part 230A may be connected to the fourth terminal 116 via the fourth terminal 290 (illustrated in FIG. 10), and the fifth connection part 232A may be connected to the fifth terminal 116 via the fifth terminal 292 (illustrated in FIG. 10). In embodiments, the plurality of electrodes 216 may be coupled to the monitor device 6 via the connection parts 222A, 224A, 226A, 228A, 230A, 232A. As such, the monitor device 6 may measure one or more resistances of the plurality of electrodes 216 for various purposes as described below. The fourth electrode 230 comprises fourth sensing parts 230B and the fifth electrode 232 comprises fifth sensing parts 232B. In embodiments, parts of the fourth electrode 230 that are not the fourth connection part 230A and/or the fourth sensing parts 230B may be referred to herein as conductor parts of the fourth electrode 230. Similarly, parts of the fifth electrode 232 that are not the fifth connection part 232A and/or the fifth sensing parts 232B may be referred to herein as conductor parts of the fifth electrode 232. Additionally or alternatively, parts of the ground electrode 222 that are not part of: a resistive pair (e.g., the first, second, and/or third resistive pairs 224B, 226B, 228B described in more detail below), the ground connection part 222A and/or the ground sensing parts 222B may be referred to herein as conductor parts of the ground electrode 222.

In embodiments, the first intermediate element 213 (depicted in FIG. 5) may be arranged between the connection parts 222A, 224A, 226A, 228A, 230A, 232A and the first adhesive layer 200. As stated above, by arranging the first intermediate element 213 (depicted in FIG. 5) between the first adhesive layer 200 and the connection parts 222A, 224A, 226A, 228A, 230A, 232A, the connection parts 222A, 224A, 226A, 228A, 230A, 232A may be insulated from the first adhesive layer 200.The ground electrode 222 comprises a first electrode part 234 for forming a ground for the first electrode 224. The ground electrode 222 comprises a second electrode part 236 for forming a ground for the second electrode 226. The ground electrode 222 comprises a third electrode part 238 for forming a ground for the third electrode 228. The ground electrode 222 comprises a fourth electrode part 240 for forming a ground for the fourth electrode 230 and the fifth electrode 232. The fourth electrode part 240 of the ground electrode 222 comprises ground sensing parts 222B.

In view of the foregoing, the first electrode 224 and the first electrode part 234 may form a first resistive pair 224B, the second electrode 226 and the second electrode part 236 may form a second resistive pair 226B, and the third electrode 228 and the third electrode part 238 may form a third resistive pair 228B. Each of the first, second, and third resistive pairs 224B, 226B, 228B may define respective sensing zones. Each sensing zone may indicate a moisture content of the respective sensing zone.

The moisture content of a respective sensing zone may be indicative of how well the first adhesive layer 200 (depicted in FIG. 3) is adhering to the skin surface of a user. To determine the moisture content of a respective sensing zone, a resistance between the electrodes included in the first, second, and/or third resistive pairs 224B, 226B, 228B may be sensed by, for example, the monitor device 6 (depicted in FIG. 1). And, when the resistance between the electrodes included in the first, second, and/or third resistive pairs 224B, 226B, 228B decreases below a threshold level, the monitor device 6 may send an indication to the user that the adhesion between the first adhesive layer 200 and the skin surface of a user may be deteriorating. In embodiments, when the adhesion between the first adhesive layer 200 and the skin surface of a user proximal to the third resistive pair 228B deteriorates, the monitor device 6 may send a signal to the user suggesting the user to change his/her ostomy appliance 2 and/or base plate 4. Additionally or alternatively, when the adhesion between the first adhesive layer 200 and the skin surface of a user proximal to the first resistive pair 224B and/or second resistive pair 226B deteriorates, the monitor device 6 may send a signal to the user suggesting the user to change his/her ostomy appliance 2 and/or base plate 4.

As illustrated in FIG. 6, the second resistive pair 226B may at least partially surround the first resistive pair 224B. Additionally or alternatively, the third resistive pair 228B may at least partially surround the second resistive pair 226B. Furthermore, in embodiments, one or more of the first, second, and third resistive pairs 224B, 226B, 228B may be arranged circumferentially around the stomal opening 18 (depicted in FIG. 1) and/or around the center point of the stomal opening 18.

By including different resistive pair 224B, 226B, 228B which at least partially surround one another, a monitor device 6 may determine how quickly the adhesion between the first adhesive layer 200 and the skin surface of a user may be deteriorating. For example, a monitor device 6 may determine that at time t₁ the adhesion between the first adhesive layer 200 and the skin surface of a user proximal to the first resistive pair 224B is deteriorating by sensing a reduced resistance between the electrodes included in the first resistive pair 224B. Then, at time t₂ the monitor device 6 may determine the adhesion between the first adhesive layer 200 and the skin surface of a user proximal to the second resistive pair 226B is deteriorating by sensing a reduced resistance between the electrodes included in the second resistive pair 226B. By knowing the distance between the first and second resistive pairs 226A, 228B, the monitor device 6 may calculate a velocity by dividing the distance between the first and second resistive pairs 226A, 228B by the difference between t₁ and t₂. The computed velocity may then determine how much time a user has before the adhesion between the first adhesive layer 200 and the skin surface of a user proximal to the third resistive pair 228B deteriorates, which may be when the user would like to change his/her ostomy appliance 2 and/or base plate 4.

FIG. 7 is a distal view of an exemplary masking element 218. In embodiments, the masking layer 218 may by arranged between conductor parts of the ground electrode 222, conductor parts of the fourth electrode 230, and/or conductor parts of the fifth electrode 232. That is, as stated above, the conductor parts of the ground electrode 222 are parts of the ground electrode 222 that are not the ground connection part 222A and/or the ground sensing parts 222B. Similarly, the conductor parts of the fourth electrode 230 are parts of the fourth electrode 230 that are not the fourth connection part 230A and/or the fourth sensing parts 230B and the conductor parts of the fifth electrode 232 are parts of the fifth electrode 232 that are not the fifth connection part 232A and/or the fifth sensing parts 232B. Further, because the masking element 218 may be more insulative than the first adhesive layer 200, the conductor parts of the ground electrode, the fourth electrode, and the fifth electrode may be insulated from the first adhesive layer 200.

The masking element 218 optionally has a plurality of terminal openings. For example, the masking element 218 may include one, two, three, four, five, six, seven, etc. terminal openings. In embodiments, the plurality of terminal openings comprises a ground terminal opening 242, a first terminal opening 244, a second terminal opening 246, a third terminal opening 248, a fourth terminal opening 250, and a fifth terminal opening 252. The terminal openings 242, 244, 246, 248, 250, 252 of the masking element 218 are configured to overlap (that is, axially align) with respective connection parts 222A, 224A, 226A, 228A, 230A, 232A of the electrodes of the electrode assembly. For example, connection part 222A may overlap the first terminal opening 244, connection part 224A may overlap the second terminal opening 244, connection part 226A may overlap the third terminal opening 246, connection part 228A may overlap the fourth terminal opening 250, connection part 230A may overlap the fifth terminal opening 252, and connection part 232A may overlap the sixth terminal opening 252. While the masking element 218 depicts six terminal openings, in other embodiments, the masking element 218 may include more or fewer terminal openings.

The masking element 218 has a plurality of sensor point openings. The sensor point openings comprise primary sensor point openings shown within dotted line 254. Each primary sensor point opening is configured to overlap (that is, axially align with) a ground sensing part 222B of the ground electrode 222 and/or a fourth sensing part 230B of the fourth electrode 230 of the electrode configuration 220. More specifically, in embodiments, the primary sensor point openings shown within dotted line 254 comprise, in the illustrated exemplary masking element, five primary first sensor point openings 254A each configured to overlap a ground sensing part 222B of the ground electrode 222. In addition, the primary sensor point openings shown within dotted line 254 comprise, in the illustrated exemplary masking element, four primary second sensor point openings 254B each configured to overlap a fourth sensing part 230B of the fourth electrode 230. In embodiments, each of the primary sensor point openings shown within dotted line 254 may be equal distances from a center point of the stomal opening 18. Alternatively, one or more of the primary sensor point openings shown within dotted line 254 may be different distances from a center point of the stomal opening 18. While the illustrated embodiment depicts five primary first sensor point openings 254A in the dotted line 254, in other embodiments, the masking element 218 includes more or fewer than five primary first sensor point openings 254A in the dotted line 254. Additionally or alternatively, while the illustrated embodiment depicts four primary second sensor point openings 254B in the dotted line 254, in other embodiments, the masking element 218 includes more or fewer than four primary second sensor point openings 254B in the dotted line 254.

Additionally or alternatively, the sensor point openings comprise secondary sensor point openings shown within dotted line 256. Each second sensor point opening is configured to overlap a fourth sensing part 230B of the fourth electrode 230 and/or a fifth sensing part 232B of the fifth electrode 232 of the electrode configuration 220. More specifically, in embodiments, the secondary sensor point openings shown within dotted line 256 comprise, in the illustrated exemplary masking element, five secondary first sensor point openings 256A each configured to overlap a fifth sensing part 232B of the fifth electrode 232. In addition, the secondary sensor point openings shown within dotted line 256 comprise, in the illustrated exemplary masking element, four secondary second sensor point openings 256B each configured to overlap a fourth sensing part 230B of the fourth electrode 230. In embodiments, each of the secondary sensor point openings shown within dotted line 256 may be equal distances from a center point of the stomal opening 18. Alternatively, one or more of the secondary sensor point opening shown within dotted line 256 may be different distances from a center point of the stomal opening 18. In embodiments, the secondary sensor point openings shown within dotted line 256 may be substantially the same distance from a center point of the stomal opening 18 as the primary sensor point openings shown within dotted line 254. Alternatively, one or more of the secondary sensor point openings shown within dotted line 256 may be different distance(s) from a center point of the stomal opening 18 as one or more of the primary sensor point openings shown within dotted line 254. While the illustrated embodiment depicts five secondary first sensor point openings 256A in the dotted line 256, in other embodiments, the masking element 218 includes more or fewer than five secondary first sensor point openings 256A in the dotted line 256. Additionally or alternatively, while the illustrated embodiment depicts four secondary second sensor point openings 256B in the dotted line 256, in other embodiments, the masking element 218 includes more or fewer than four secondary second sensor point openings 256B in the dotted line 256.

Additionally or alternatively, the sensor point openings comprise tertiary sensor point openings shown within dotted line 258. Each tertiary sensor opening is configured to overlap a fifth sensing part 232B of the fifth electrode 232 and/or a ground sensing part 222B of the ground electrode 222 of the electrode configuration 220. More specifically, in embodiments, he tertiary sensor point openings shown within dotted line 258 comprise, in the illustrated exemplary masking element, five tertiary first sensor point openings 258A each configured to overlap a fifth sensing part 232B of the fifth electrode 232. In addition, the tertiary sensor point openings shown within dotted line 258 comprise, in the illustrated exemplary masking element, four tertiary second sensor point openings 258B each configured to overlap a ground sensing part 222B of the ground electrode 222. In embodiments, each of the tertiary sensor point openings shown within dotted line 258 may be equal distances from a center point of the stomal opening 18. Alternatively, one or more of the tertiary sensor point opening shown within dotted line 258 may be different distances from a center point of the stomal opening 18. In embodiments, the tertiary sensor point openings shown within dotted line 258 may be substantially the same distance from a center point of the stomal opening 18 as the primary sensor point openings shown within dotted line 254. Alternatively, one or more of the tertiary sensor point openings shown within dotted line 258 may be different distance(s) from a center point of the stomal opening 18 as one or more of the primary sensor point openings shown within dotted line 254. Additionally or alternatively, the tertiary sensor point openings shown within dotted line 258 may be substantially the same distance from a center point of the stomal opening 18 as the secondary sensor point openings shown within dotted line 256. Alternatively, one or more of the tertiary sensor point openings shown within dotted line 258 may be different distance(s) from a center point of the stomal opening 18 as one or more of the secondary sensor point openings shown within dotted line 256. While the illustrated embodiment depicts five tertiary first sensor point openings 258A in the dotted line 258, in other embodiments, the masking element 218 includes more or fewer than five tertiary first sensor point openings 258A in the dotted line 258. Additionally or alternatively, while the illustrated embodiment depicts four tertiary second sensor point openings 258B in the dotted line 258, in other embodiments, the masking element 218 includes more or fewer than four tertiary second sensor point openings 258B in the dotted line 258.

While the primary sensor point openings shown within dotted line 254, secondary sensor point openings shown within dotted line 256, and tertiary sensor point openings shown within dotted line 258 are evenly distributed angularly about the stomal opening 18, in other embodiments, the primary sensor point openings shown within dotted line 254, secondary sensor point openings shown within dotted line 256, and tertiary sensor point openings shown within dotted line 258 may be unevenly distributed angularly about the stomal opening 18 and/or focused within an angular range about the stomal opening 18 (e.g., 30 degrees-330 degrees). However, these are only examples and not meant to be limiting. Additionally or alternatively, while the illustrated embodiment depicts three sectors of sensor point openings (i.e., the primary sensor point openings, the secondary sensor point openings, and the tertiary sensor point openings), in alternative embodiments, the masking element 218 may include more or fewer sectors of sensor points openings. Additionally or alternatively, each sector may be unevenly distributed about the center point of the stomal opening 18, each sector may span different angular ranges, which may or may not be the same between the sectors, and/or may have different starting angles and/or different ending angles.

FIG. 8 is a distal view of an exemplary first adhesive layer 200 and FIG. 9 is a proximal view of the first adhesive layer of FIG. 8. The first adhesive layer 200 has a plurality of sensor point openings. The sensor point openings of the first adhesive layer comprise primary sensor point openings shown within dotted line 260. Each primary sensor point opening is configured to overlap a ground sensing part 222B of the ground electrode 222 and/or a fourth sensing part 230B of the fourth electrode 230 of the electrode configuration 220. More specifically, in embodiments, the primary sensor point openings shown within dotted line 260 comprise, in the illustrated exemplary first adhesive layer 200, five primary first sensor point openings 260A each configured to overlap a ground sensing part 222B of the ground electrode 222. In addition, the primary sensor point openings shown within dotted line 260 comprise, in the illustrated exemplary first adhesive layer 200, four primary second sensor point openings 260B each configured to overlap a fourth sensing part 230B of the fourth electrode 230. In embodiments, each of the primary sensor point openings shown within dotted line 260 may be equal distances from a center point of the stomal opening 18. Alternatively, one or more of the primary sensor point opening shown within dotted line 260 may be different distances from a center point of the stomal opening 18. While the illustrated embodiment depicts five primary first sensor point openings 260A in the dotted line 260, in other embodiments, the first adhesive layer 200 includes more or fewer than five primary first sensor point openings 260A in the dotted line 260. Additionally or alternatively, while the illustrated embodiment depicts four primary second sensor point openings 260B in the dotted line 260, in other embodiments, the first adhesive layer 200 includes more or fewer than four primary second sensor point openings 260B in the dotted line 260.

Additionally or alternatively, the sensor point openings of the first adhesive layer comprise secondary sensor point openings shown within dotted line 262. Each second sensor point opening is configured to overlap a fourth sensing part 230B of the fourth electrode 230 and/or a fifth sensing part 232B of the fifth electrode 232 of the electrode configuration 220. More specifically, in embodiments, the secondary sensor point openings shown within dotted line 262 comprise, in the illustrated exemplary first adhesive layer 200, five secondary first sensor point openings 262A each configured to overlap a fifth sensing part 232B of the fifth electrode 232. In addition, the secondary sensor point openings shown within dotted line 262 comprise, in the illustrated exemplary first adhesive layer 200, four secondary second sensor point openings 262B each configured to overlap a fourth sensing part 230B of the fourth electrode 230. In embodiments, each of the secondary sensor point openings shown within dotted line 262 may be equal distances from a center point of the stomal opening 18. Alternatively, one or more of the secondary sensor point opening shown within dotted line 262 may be different distances from a center point of the stomal opening 18. In embodiments, the secondary sensor point openings shown within dotted line 262 may be substantially the same distance from a center point of the stomal opening 18 as the primary sensor point openings shown within dotted line 260. Alternatively, one or more of the secondary sensor point openings shown within dotted line 262 may be different distance(s) from a center point of the stomal opening 18 as one or more of the primary sensor point openings shown within dotted line 260. While the illustrated embodiment depicts five secondary first sensor point openings 262A in the dotted line 262, in other embodiments, the first adhesive layer 200 includes more or fewer than five secondary first sensor point openings 262A in the dotted line 262. Additionally or alternatively, while the illustrated embodiment depicts four secondary second sensor point openings 262B in the dotted line 262, in other embodiments, the first adhesive layer 200 includes more or fewer than four secondary second sensor point openings 262B in the dotted line 262.

Additionally or alternatively, the sensor point openings of the first adhesive layer 200 comprise tertiary sensor point openings shown within dotted line 264. Each tertiary sensor opening is configured to overlap a fifth sensing part 232B of the fifth electrode 232 and/or a ground sensing part 222B of the ground electrode 222 of the electrode configuration 220. More specifically, in embodiments, the tertiary sensor point openings shown within dotted line 264 comprise, in the illustrated exemplary first adhesive layer 200, five tertiary first sensor point openings 264A each configured to overlap a fifth sensing part 232B of the fifth electrode 232. In addition, the tertiary sensor point openings shown within dotted line 264 comprise, in the illustrated exemplary first adhesive layer 200, four tertiary second sensor point openings 264B each configured to overlap a ground sensing part 222B of the ground electrode 222. In embodiments, each of the tertiary sensor point openings shown within dotted line 264 may be equal distances from a center point of the stomal opening 18. Alternatively, one or more of the tertiary sensor point opening shown within dotted line 264 may be different distances from a center point of the stomal opening 18. In embodiments, the tertiary sensor point openings shown within dotted line 264 may be substantially the same distance from a center point of the stomal opening 18 as the primary sensor point openings shown within dotted line 260. Alternatively, one or more of the tertiary sensor point openings shown within dotted line 264 may be different distance(s) from a center point of the stomal opening 18 as one or more of the primary sensor point openings shown within dotted line 260. Additionally or alternatively, the tertiary sensor point openings shown within dotted line 264 may be substantially the same distance from a center point of the stomal opening 18 as the secondary sensor point openings shown within dotted line 262. Alternatively, one or more of the tertiary sensor point openings shown within dotted line 264 may be different distance(s) from a center point of the stomal opening 18 as one or more of the secondary sensor point openings shown within dotted line 262. While the illustrated embodiment depicts five tertiary first sensor point openings 264A in the dotted line 264, in other embodiments, the first adhesive layer 200 includes more or fewer than five tertiary first sensor point openings 264A in the dotted line 264. Additionally or alternatively, while the illustrated embodiment depicts four tertiary second sensor point openings 264B in the dotted line 264, in other embodiments, the first adhesive layer 200 includes more or fewer than four tertiary second sensor point openings 264B in the dotted line 264.

Additionally or alternatively, while the illustrated embodiment depicts three sectors of sensor point openings (i.e., the primary sensor point openings, the secondary sensor point openings, and the tertiary sensor point openings), in alternative embodiments, the first adhesive layer 200 may include more or fewer sectors of sensor points openings. Additionally or alternatively, each sector may be unevenly distributed about the center point of the stomal opening 18, each sector may span different angular ranges, which may or may not be the same between the sectors, and/or may have different starting angles and/or different ending angles.

In view of the foregoing, the primary sensor point openings shown within dotted line 254 of the masking element 218 (depicted in FIG. 7) may overlap the primary sensor point openings shown within dotted line 260 of the first adhesive layer 200. More specifically, each of the five primary first sensor point openings 254A may overlap a respective one of the five primary first sensor point openings 260A. As such, the ground sensor points 222B, which the five primary first sensor point openings 254A and the five primary first sensor point openings 260A overlap, may be exposed in an axial direction from the proximal surface 200B of the first adhesive layer 200. Furthermore, each of the four primary second sensor point openings 254B may overlap a respective one of the four primary second sensor point openings 260B. As such, the fourth sensor points 230B, which the four primary second sensor point openings 254B and the four primary second sensor point openings 260B overlap, may be exposed in an axial direction from the proximal surface 200B of the first adhesive layer 200. In embodiments, when output spans or bridges from a ground sensor point 222B to a fourth sensor point 230B, a leak may be detected by, for example, the monitor device 6. More specifically, a drop in resistance may be sensed between a ground sensor point 222B and a fourth sensor point 230B by the monitor device 6 in response to output spanning and/or bridging from a ground sensor point 222B to a fourth sensor point 230B.

Additionally or alternatively, the second sensor point openings shown within dotted line 256 of the masking element 218 (depicted in FIG. 7) may overlap the second sensor point openings shown within dotted line 262 of the first adhesive layer 200. More specifically, each of the five secondary first sensor point openings 256A may overlap a respective one of the five secondary first sensor point openings 262A. As such, the fifth sensor points 232B, which the five secondary first sensor point openings 256A and the five secondary first sensor point openings 262A overlap, may be exposed in an axial direction from the proximal surface 200B of the first adhesive layer 200. Furthermore, each of the four secondary second sensor point openings 256B may overlap a respective one of the four secondary second sensor point openings 262B. As such, the fourth sensor points 230B, which the four secondary second sensor point openings 256B and the four secondary second sensor point openings 262B overlap, may be exposed in an axial direction from the proximal surface 200B of the first adhesive layer 200. In embodiments, when output spans or bridges from a fifth sensor point 232B to a fourth sensor point 230B, a leak may be detected by, for example, the monitor device 6. More specifically, a drop in resistance may be sensed between a fifth sensor point 232B and a fourth sensor point 230B by the monitor device 6 in response to output spanning and/or bridging from a fifth sensor point 232B to a fourth sensor point 230B.

Additionally or alternatively, the tertiary sensor point openings shown within dotted line 258 of the masking element 218 (depicted in FIG. 7) may overlap the tertiary sensor point openings shown within dotted line 264 of the first adhesive layer 200. More specifically, each of the five tertiary first sensor point openings 258A may overlap a respective one of the five tertiary first sensor point openings 264A. As such, the ground sensor points 222B, which the five tertiary first sensor point openings 258A and the five tertiary first sensor point openings 264A overlap, may be exposed in an axial direction from the proximal surface 200B of the first adhesive layer 200. Furthermore, each of the four tertiary second sensor point openings 258B may overlap a respective one of the four tertiary second sensor point openings 264B. As such, the fifth sensor points 232B, which the four tertiary second sensor point openings 258B and the four tertiary second sensor point openings 264B overlap, may be exposed in an axial direction from the proximal surface 200B of the first adhesive layer 200. In embodiments, when output spans or bridges from a ground sensor point 222B to a fifth sensor point 232B, a leak may be detected by, for example, the monitor device 6. More specifically, a drop in resistance may be sensed between a ground sensor point 222B and a fifth sensor point 232B by the monitor device 6 in response to output spanning and/or bridging from a ground sensor point 222B to a fifth sensor point 232B.

FIG. 10 is a more detailed distal view of a part of the base plate 4 and/or the sensor assembly part 700. Monitor interface of the base plate and/or the sensor assembly part comprises the first connector 211. The first connector 211 comprises coupling part 210 configured to releasably couple the monitor device to the base plate and/or the sensor assembly part and thus forming a releasable coupling. The first connector 221/monitor interface comprises a plurality of terminals formed by respective terminal elements for forming respective electrical connections with respective terminals of the monitor device.

In embodiments, the plurality of terminals of the first connector 211 of the monitor interface comprises a ground terminal element 282 forming a ground terminal 282A, a first terminal element 284 forming a first terminal 284A, a second terminal element 286 forming a second terminal 286A, and a third terminal element 288 forming a third terminal 288A. The monitor interface optionally comprises a fourth terminal element 290 forming a fourth terminal 290A and/or a fifth terminal element 292 forming a fifth terminal 292A. The terminal elements 282, 284, 286, 288, 290, 292 contact respective connection parts 222A, 224A, 226A, 228A, 230 a, 232A of electrodes 222, 224, 226, 228, 230, 232. he use of the terms “first”, “second”, “third” and “fourth”, “primary”, “secondary”, “tertiary” etc. does not imply any particular order, but are included to identify individual elements. Moreover, the use of the terms “first”, “second”, “third” and “fourth”, “primary”, “secondary”, “tertiary” etc. does not denote any order or importance, but rather the terms “first”, “second”, “third” and “fourth”, “primary”, “secondary”, “tertiary” etc. are used to distinguish one element from another. Note that the words “first”, “second”, “third” and “fourth”, “primary”, “secondary”, “tertiary” etc. are used here and elsewhere for labelling purposes only and are not intended to denote any specific spatial or temporal ordering. Furthermore, the labelling of a first element does not imply the presence of a second element and vice versa.

Although particular features have been shown and described, it will be understood that they are not intended to limit the claimed invention, and it will be made obvious to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the claimed invention. The specification and drawings are, accordingly to be regarded in an illustrative rather than restrictive sense. The claimed invention is intended to cover all alternatives, modifications and equivalents.

Embodiments of the present disclosure are set out in the following items:

1. A sensor assembly part of an ostomy appliance, the sensor assembly part comprising:

-   -   a first adhesive layer including: a stomal opening with a center         point and a proximal surface configured to be attached to a skin         surface of a user;     -   a masking element arranged on a distal surface of the first         adhesive layer, wherein the masking element is more insulative         than the first adhesive layer; and     -   a plurality of electrodes arranged on a distal side of the first         adhesive layer, each electrode including a sensing part and a         conductor part, wherein the masking element is arranged between         the conductor parts and the first adhesive layer.

2. The sensor assembly part of item 1, the plurality of electrodes being formed on a proximal surface of a support layer.

3. The sensor assembly part of item 2, the plurality of electrodes being printed on the support layer.

4. The sensor assembly part of any of items 1-3, the plurality of electrodes forming a first resistive pair of electrodes and a second resistive pair of electrodes, wherein each resistive pair of electrodes includes an electrode part of a ground electrode.

5. The sensor assembly part of any of items 1-4, wherein the second resistive pair of electrodes at least partially surrounds the first resistive pair of electrodes.

6. The sensor assembly part of any of items 1-5 as dependent on item 4, the plurality of electrodes forming a third resistive pair of electrodes, wherein the third resistive pair of electrodes includes an electrode part of a ground electrode.

7. The sensor assembly part of any of items 1-6 as dependent on item 6, wherein the third resistive pair of electrodes at least partially surrounds the second resistive pair of electrodes.

8. The sensor assembly part of any of items 1-7 as dependent on item 6, wherein at least one of the first resistive pair, the second resistive pair, and the third resistive pair are arranged circumferentially around the center point.

9. The sensor assembly part of any of items 1-8, further comprising a first intermediate element, wherein the first intermediate element is less compliant than the first adhesive layer, wherein each electrode includes a connection part and wherein the first intermediate element is arranged between the connection parts and the first adhesive layer.

10. The sensor assembly part of any of items 1-9, wherein each electrode includes a connection part, wherein the masking element comprises a plurality of terminal openings, and wherein each terminal opening overlaps a connection part.

11. The sensor assembly part of any of items 1-10, wherein the first adhesive layer comprises a plurality of openings, wherein the masking element comprises a plurality of openings, and wherein each opening of the plurality of openings of the first adhesive layer overlaps an opening of the plurality of openings of the masking element for form a sensor point.

12. The sensor assembly part of any of items 1-11 as dependent on item 10, wherein the sensor points are arranged at generally equal distances from the center point.

13. The sensor assembly part of any of items 1-12, further comprising a second adhesive layer arranged distally of the plurality of electrodes.

14. The sensor assembly part of any of items 1-13 as dependent on item 13, wherein the first adhesive layer and the second adhesive layer are comprised of different ratios of one or more of: polyisobutenes, styrene-isoprene-styrene, and/or hydrocoloids.

LIST OF REFERENCES

1 ostomy system 2 ostomy appliance 4 base plate 6 monitor device 8 accessory device 10 server device 12 network 14 coupling member 16 coupling ring 18 stomal opening 20 docking station 22 first connector 24 user interface 100 monitor device housing 101 processor 102 first interface 104 second interface 106 memory 108 ground terminal of monitor device 110 first terminal of monitor device 112 second terminal of monitor device 114 third terminal of monitor device 116 fourth terminal of monitor device 118 fifth terminal of monitor device 120 coupling part 121 power unit 122 antenna 124 wireless transceiver 126 loudspeaker 128 haptic feedback element 140 sensor unit 200 first adhesive layer 200A distal surface of first adhesive layer 200B proximal surface of first adhesive layer 202 second adhesive layer 202A distal surface of second adhesive layer 202B proximal surface of second adhesive layer 204 electrode assembly 204A distal surface of electrode assembly 204B proximal surface of electrode assembly 206 release liner 206A distal surface of the release liner 206B proximal surface of the release liner 208 top layer 208A distal surface of the top layer 208B proximal surface of the top layer 209 coupling ring 210 coupling part of first connector 211 first connector 212 terminals of first connector 213 first intermediate element 213A distal surface of first intermediate element 213B proximal surface of first intermediate element 214 support layer of electrode assembly 214A distal surface of support layer 214B proximal surface of support layer 216 electrodes of electrode assembly 218 masking element 218A distal surface of masking element 218B proximal surface of masking element 220 electrode configuration 222 ground electrode 222A ground connection part 222B ground sensing part 224 first electrode 224A first connection part 224B first resistive pair 226 second electrode 226A second connection part 226B second resistive pair 228 third electrode 228A third connection part 228B third resistive pair 230 fourth electrode 230A fourth connection part 230B fourth sensing part 232 fifth electrode 232A fifth connection part 232B fifth sensing part 234 first electrode part of the ground electrode 236 second electrode part of the ground electrode 238 third electrode part of the ground electrode 240 fourth electrode part of the ground electrode 242 ground terminal opening 244 first terminal opening 246 second terminal opening 248 third terminal opening 250 fourth terminal opening 252 fifth terminal opening 254 primary sensor point openings of masking element 254A primary first sensor point opening 254B primary second sensor point opening 256 secondary sensor point openings of masking element 256A secondary first sensor point opening 256B secondary second sensor point opening 258 tertiary sensor point openings of masking element 258A tertiary first sensor point opening 258B tertiary second sensor point opening 260 primary sensor point openings of first adhesive layer 260A primary first sensor point opening 260B primary second sensor point opening 262 secondary sensor point openings of first adhesive layer 262A secondary first sensor point opening 262B secondary second sensor point opening 264 tertiary sensor point openings of first adhesive layer 264A tertiary first sensor point opening 264B tertiary second sensor point opening 282 ground terminal element 282A ground terminal 284 first terminal element 284A first terminal 286 second terminal element 286A second terminal 288 third terminal element 288A third terminal 290 fourth terminal element 290A fourth terminal 292 fifth terminal element 292A fifth terminal 700 sensor assembly part 

1. A base plate of a medical appliance, the base plate comprising: a first adhesive layer including: a stomal opening with a center point and a proximal surface configured to be attached to a skin surface of a user; a masking element arranged on a distal surface of the first adhesive layer, wherein the masking element is more insulative than the first adhesive layer; and a plurality of electrodes arranged on a distal side of the first adhesive layer, each electrode including a sensing part and a conductor part, wherein the masking element is arranged between the conductor parts of the plurality of electrodes and the first adhesive layer, and wherein the masking element is not arranged between the sensing parts of the plurality of electrodes and the first adhesive layer.
 2. The base plate of claim 1, wherein the plurality of electrodes is formed on a proximal surface of a support layer.
 3. The base plate of claim 2, wherein the plurality of electrodes is printed on the support layer.
 4. The base plate of claim 1, wherein the plurality of electrodes forms a first resistive pair of electrodes and a second resistive pair of electrodes, wherein each resistive pair of electrodes includes an electrode part of a ground electrode.
 5. The base plate of claim 4, wherein the second resistive pair of electrodes at least partially surrounds the first resistive pair of electrodes.
 6. The base plate of claim 4, wherein the plurality of electrodes forms a third resistive pair of electrodes, wherein the third resistive pair of electrodes includes an electrode part of a ground electrode.
 7. The base plate of claim 4, wherein the third resistive pair of electrodes at least partially surrounds the second resistive pair of electrodes.
 8. The base plate of claim 4, wherein at least one of the first resistive pair, the second resistive pair, and the third resistive pair are arranged circumferentially around the center point.
 9. The base plate of claim 1, further comprising a first intermediate element, wherein the first intermediate element is less compliant than the first adhesive layer, wherein each electrode includes a connection part and wherein the first intermediate element is arranged between the connection parts and the first adhesive layer.
 10. The base plate of claim 1, wherein each electrode includes a connection part, wherein the masking element comprises a plurality of terminal openings, and wherein each terminal opening overlaps a connection part.
 11. The base plate of claim 1, wherein the first adhesive layer comprises a plurality of openings, wherein the masking element comprises a plurality of openings, and wherein each opening of the plurality of openings of the first adhesive layer overlaps an opening of the plurality of openings of the masking element to form a sensor point.
 12. The base plate of claim 10, wherein the sensor points are arranged at generally equal distances from the center point.
 13. The base plate of claim 1, further comprising a second adhesive layer arranged distally of the plurality of electrodes.
 14. The base plate of claim 13, wherein the first adhesive layer and the second adhesive layer are comprised of different ratios of one or more of: polyisobutenes, styrene-isoprene-styrene, and/or hydrocoloids. 